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STMicroelectronics VIPER06LS
- Part No.:
- VIPER06LS
- Manufacturer:
- STMicroelectronics
- Category:
- AC DC Converters, Offline Switches
- Package:
- 10-SOP (0.154", 3.90mm Width)
- Datasheet:
-
VIPER06LS.pdf
- Description:
- IC OFFLINE SWITCH MULT TOP 10SSO
- Quantity:
- Payment:
- Shipping:
Inventory:3,545
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Product details
Overview
VIPER06LS from STMicroelectronics is a high-voltage offline PWM controller with integrated 800 V avalanche-rugged power MOSFET, designed for flyback and buck converters in low-power AC/DC applications. It operates at 60 kHz fixed frequency with jittering, delivers up to 5 W in open-frame designs, supports direct mains-derived self-biasing (no auxiliary winding), and achieves <30 mW standby power at 265 VAC.
For engineers reviewing the VIPER06LS datasheet, VIPER06LS pinout, VIPER06LS application, or VIPER06LS equivalent, this page provides verified technical context on its current-mode control architecture, adjustable overcurrent limit via LIM pin, burst-mode operation for energy compliance, and thermal/auto-restart protection behavior under fault conditions.
Technical Context
The VIPER06LS implements a current-mode PWM controller with cycle-by-cycle drain current sensing via internal SenseFET, enabling precise peak-current limiting and stable loop control. Its oscillator is fixed at 60 kHz (±4 kHz modulation depth at 230 Hz) to reduce EMI without external components.
It integrates an on-chip high-voltage current generator that powers the VDD capacitor during startup and off-time, eliminating need for auxiliary winding. Protection includes hysteretic thermal shutdown (150–160 °C), safe auto-restart after overload (tRESTART = 1 s), and open-loop failure detection when powered from auxiliary winding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching frequency | 60 kHz ±4 kHz (jittered); reduces EMI filter cost and simplifies compliance with CISPR-22 Class B. |
| Drain voltage rating | 800 V avalanche rugged; enables direct connection to 265 VAC rectified input without external snubber. |
| Standby power | <30 mW at 265 VAC; meets EU CoC Tier 2 and DOE Level VI energy efficiency requirements. |
| Current limit adjust | Set via external resistor on LIM pin; default IDlim = 0.35 A (typ), reduced to 85 mA in burst mode to suppress audible noise. |
| Thermal protection | Hysteretic shutdown at 150–160 °C with 30 °C hysteresis; prevents thermal runaway during sustained overload. |
| Soft-start time | 8.5 ms fixed; limits inrush current and avoids transformer saturation during power-up or fault recovery. |
| Burst mode threshold | VCOMP drops below 1.1 V (typ); triggers ultra-low-power cycling to maintain regulation at light loads. |
Pinout & Package
The VIPER06LS is available in SSO10 package (10-pin shrink small outline) with exposed metal pad for thermal dissipation. DRAIN pins (6–10) are internally connected and must be soldered to large copper area for effective heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Controller ground reference | Source node for internal MOSFET and error amplifier; must be low-inductance connection to minimize noise coupling. |
| VDD (Pin 2) | Control section supply | Charged by internal HV current generator; clamped at 23.5 V; powers all logic and gate driver circuits. |
| LIM (Pin 3) | Adjustable current limit set point | Sinks current to GND via RLIM; sets peak drain current from 0.35 A down to ~0.1 A; open = default limit. |
| FB (Pin 4) | Inverting input of transconductance error amplifier | Accepts feedback voltage; reference = 3.3 V; single-resistor connection suffices for 3.3 V output; divider needed for higher voltages. |
| COMP (Pin 5) | Error amplifier output & PWM comparator input | Drives RC compensation network; optocoupler interface point in isolated designs; 1–3 V dynamic range defines burst/on thresholds. |
| DRAIN (Pins 6–10) | High-voltage MOSFET drain terminals | Internally paralleled; carry full switching current; connected to metal frame for thermal conduction; require ≥100 mm² Cu pour. |
Key Features
| Feature | Design Value |
|---|---|
| No auxiliary winding required | Integrated HV current generator powers VDD directly from DRAIN, reducing BOM count and PCB space in <5 W adapters. |
| Adjustable overcurrent protection | RLIM resistor scales peak drain current from 0.35 A down to ~0.1 A, enabling design flexibility across load ranges and safety margins. |
| Burst-mode operation | Reduces average switching frequency to hundreds of Hz at light load, cutting core loss, conduction loss, and audible noise simultaneously. |
| Safe auto-restart after fault | 1 s fixed restart delay with soft-start reinitialization prevents thermal accumulation during repeated short-circuit events. |
| Open-loop failure protection | Detects FB disconnection or optocoupler failure in isolated supplies, clamping VDD and limiting power delivery to prevent overvoltage. |
Applications
| Smart Home Power Adapters | Energy Meter Auxiliary Supplies |
|---|---|
|
Use Scenario: Compact non-isolated flyback supplying 3.3 V/100 mA to MCU and sensors in smart plugs and thermostats. IC Role / Device Role / Timing Role: Primary-side controller managing regulation, current limiting, and burst-mode transitions without optocoupler. Use Value: Eliminates auxiliary winding and optocoupler, reducing bill-of-materials by 3 components while maintaining <30 mW standby. |
Use Scenario: Isolated flyback powering metrology ICs and RTC in DIN-rail electricity meters operating 24/7. IC Role / Device Role / Timing Role: Self-biased primary-side controller with open-loop protection ensuring safe shutdown if feedback path fails. Use Value: Prevents hazardous overvoltage on secondary side during optocoupler aging or solder joint fracture-critical for IEC 62053 compliance. |
| LED Driver for Indirect Lighting | White Goods Control Power |
|
Use Scenario: Constant-voltage 12 V/300 mA supply for LED strips in cabinets and under-counter lighting. IC Role / Device Role / Timing Role: Fixed-frequency PWM controller regulating output via single-resistor FB connection and COMP-based compensation. Use Value: 60 kHz operation allows use of small ferrite transformers and low-ESR electrolytics, enabling <15 mm profile designs. |
Use Scenario: Embedded 5 V/200 mA supply for microcontroller, display, and relay drivers in washing machine control boards. IC Role / Device Role / Timing Role: High-voltage converter handling wide-input (85–265 VAC) and surviving surge events per IEC 61000-4-5. Use Value: 800 V avalanche rating withstands line transients without external TVS, reducing component count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar offline PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICE2QS03G | Fixed 65 kHz frequency, no jittering; requires auxiliary winding; 650 V MOSFET; no burst mode. | Lacks direct mains biasing and ultra-low standby capability; suitable only where auxiliary winding is already present. | Choose only if existing design uses auxiliary bias and EMI filtering budget permits higher peak harmonics. |
| LNK306P | 725 V MOSFET; 66 kHz; integrated X-capacitor discharge; no adjustable current limit; different pinout. | Includes automatic X-cap discharge for safety compliance but lacks LIM pin adjustability and soft-start timing control. | Select when UL/IEC 62368-1 X-cap discharge is mandatory and design tolerates fixed 0.39 A current limit. |
Compared with ICE2QS03G and LNK306P, VIPER06LS offers unique combination of 800 V ruggedness, no-auxiliary-winding operation, user-adjustable current limit, and burst-mode noise suppression-making it optimal for compact, ultra-efficient, and cost-sensitive consumer power supplies.
Availability
VIPER06LS is available at Aetrix Electronics and suitable for smart home adapters, energy meter auxiliary supplies, LED drivers for indirect lighting, and white goods control power requiring stable component supply across industrial and consumer production programs.
Supply support for VIPER06LS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and power management applications since 1987.
VIPER06LS belongs to ST's VIPer™ family of high-voltage offline controllers, engineered specifically for cost-sensitive, low-power AC/DC conversion where integration, reliability, and energy compliance are critical.
FAQ
What is the purpose of the LIM pin on VIPER06LS?
The LIM pin allows adjustment of the peak drain current limit by connecting an external resistor to GND. With RLIM = open, the default limit is 0.35 A (typ). Reducing RLIM lowers IDlim linearly down to ~0.1 A, enabling fine-tuned overcurrent protection for specific transformer and output requirements without changing the IC.
Can VIPER06LS operate without an auxiliary winding?
Yes-VIPER06LS integrates a high-voltage current generator that draws power directly from the DRAIN pins during startup and MOSFET off-time. This eliminates the need for an auxiliary winding in most ≤5 W applications, simplifying transformer design and reducing component count while maintaining regulation accuracy.
How does burst mode reduce audible noise?
In burst mode, VIPER06LS halts switching entirely when load falls below threshold, then resumes with soft-start for short bursts. The peak drain current is reduced to 85 mA during these bursts, lowering mechanical vibration in transformers and minimizing magnetostrictive hum-critical for quiet indoor environments like bedrooms and offices.
What happens during open-loop failure in an isolated flyback using VIPER06LS?
When FB is disconnected or optocoupler fails in an isolated design, VIPER06LS detects loss of feedback and enters open-loop protection: VDD is clamped at 23.5 V, power delivery is limited, and output voltage rise is constrained. This prevents dangerous overvoltage on secondary side-ensuring compliance with IEC 62368-1 safety requirements.
VIPER06LS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPer™ plus
- Package/Case:
- 10-SOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Output Isolation:
- Either
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 800V
- Topology:
- Buck, Flyback
- Voltage - Start Up:
- 13 V
- Voltage - Supply (Vcc/Vdd):
- 11.5V ~ 23.5V
- Duty Cycle:
- 70%
- Frequency - Switching:
- 60kHz
- Power (Watts):
- 8 W
- Fault Protection:
- Current Limiting, Open Loop, Over Temperature
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-SSOP
- Mounting Type:
- Surface Mount
VIPER06LS FAQ
1.How can I place an order for VIPER06LS through Aetrix?
Please submit a Request for Quotation (RFQ) for VIPER06LS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for VIPER06LS reliable?
The price and inventory of VIPER06LS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VIPER06LS is usually 5 days.
3.What payment methods are accepted for VIPER06LS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VIPER06LS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VIPER06LS?
VIPER06LS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VIPER06LS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for VIPER06LS?
For technical support, including VIPER06LS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VIPER06LS requirements.
6.How does Aetrix verify that VIPER06LS is sourced from the original manufacturer or authorized distributors?
All VIPER06LS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that VIPER06LS meets industry standards.
7.What is the process for return or replacement of VIPER06LS?
All VIPER06LS units undergo pre-shipment inspection (PSI). If there is an issue with VIPER06LS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The VIPER06LS part is unused and in its original packaging.
Return procedure for VIPER06LS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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